20310120 has 48 divisors (see below), whose sum is σ = 66009060. Its totient is φ = 5415936.

The previous prime is 20310119. The next prime is 20310131. The reversal of 20310120 is 2101302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20304036 + 6084 = 4506^2 + 78^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27849 + ... + 28568.

Almost surely, 2^20310120 is an apocalyptic number.

20310120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20310120 is an abundant number, since it is smaller than the sum of its proper divisors (45698940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20310120 is a wasteful number, since it uses less digits than its factorization.

20310120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56434 (or 56427 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20310120 is about 4506.6750493019. The cubic root of 20310120 is about 272.8375638770.

Adding to 20310120 its reverse (2101302), we get a palindrome (22411422).

The spelling of 20310120 in words is "twenty million, three hundred ten thousand, one hundred twenty".